Pivoted gate for skip hoists



Dec. 20, 1927.

C. P. ROSS PIVOTED GATE FOR SKIP HOISTS 1926 3 Sheets-Sheet l Filed June '2 fifa Dec. 20, 1927. i

c. P. Ross PIVOTED GATE FOR SKIP HOISTS 5 Sheets-Sheet 2 led June '7, 1926 ga/e E DOSS Dec. 20, 1927.

c. P.'Ross PIVOTED GATE FOR SKIP HOISTS Filed June 7, 1926 3 Sheets-Sheet 3 Patented Bec. 20, 1927.

STATES CLYDE ROSS, OF KENILWORTI-I, ILLINOIS.

PIVO'IED GATE FOR SKIP HOISTS.

Application ied June 7, 1926. Serial No. 114,110.

Thisinvention relates generally to improvements in pivoted gates for skip-hoists for handling granular materials from a hopper to an elevated dumping point and has particular reference to certain details and novel features ot construction tending to increase the general efficiency and serviceability ot apparatus of this character.

It is among the objects of this invention to provide a novel gate construction having an attached counter-weight which lies in the plane of the gate side and which counterweight is supported directly on the trame of the gate side. In a preferred form two counter-weights are employed, one for each side ot' the gate.

Another object of the invention iinds embodiment in the provision ot a single hook :tor moving the gate into open posit-ion by the torce of the skip bucket, which hook is pivotally connected to the underside of the gate and relatively centrally between the gate pivotalbearings, thus avoiding any twisting of the gate about its pivotal support such as may bepresent it two spaced hooks are employed.

A further object ot the invention is Jfound in the particular construction of the gate tilting hook including a shock absorbing spring and iieXible means tor .supporting the hook in operative position for engagement by the bucket.

Vith the above and other objects in view, my invention consists in the novel combination7 construction and arrangement ot the parts and members shown in the accompanying drawings, described in the following specifications and particularly pointed out in the appended claims.

Referring to the drawings:

Figure 1 is a cross section of a hopper pit showing the skip-bucket in loading position with the gate open permitting the iiow of the material directly into the bucket.

Figure 2 is a sectional view on line 22 ot Figure 1, showing the gate in open position with a portion thereofA broken to show the interior.

Figure 3 is a plan view ot the gate tilting hook and Figure et is a section of same taken on line 4 4 of Figure 3.

Figure 5 is a cross section taken on line 5-5 ot Figure 47 showing the grooved or channeled collar.

Figure 6 is a cross section et the gate and chute on line 6-6 ott Figure 2.

Figure 7 is a cross section taken on line 7 7 of Figure 6.

Figure 8 is also a cross section taken on line 8 8 ot Figure 6 showing the pivotal gate support on the chute. n

In the illustrations 10 indicates the concrete pit walls and 11 a hopper adapted to receive granular materials such as coal, sand and the like, which hopper is adapted to permit the flow ot the materials into a chute 12.

The chute 12 of sheet metal construction consists generally of a bottom 12A, side plates 12B and a cover'plate 12C extending partly over the top thereof. An angle iron frame 13 connects the chute 12 to the bottom ot the hopper 11.

The chute 12 is provided with a substantial yoke 14 which is securely riveted to the chute sides and corner angles and which yoke 14 carries a pair of pins 15 which act as pivotal supports for the gate 16.

The gate 16 consists ot an arcuate gate plate 16A formed with an integral iiat extension 16M. The gate plate 16A is riveted to the arcuate corner angles 16B which are securely riveted to the gate side plates 16C, the angles 16B at their lower ends extend a short distance above the gate plate extension 16AA and their upper ends 16BB are formed straight and at a tangent to the curved portions. The upper portions 16BB of the structural angles 16B extend above the sides 16C of the gate and a flat counterweight 17 is securely attached to each portion 16BB with bolts 17A. This arrangement throws the effective pressure ot the counterweights directly on the gate and near its pivotal support and altords not only a very economical form of construction but places the effective pressure of the counterweight directly on the gate sides. A front plate 16D connecting the side plates 16C acts to prevent the materials from charging over the front of the The hook 19 is termed with pair et inftegral bearings 19A Within Which is a slidably mounted bar lQB of round cross section having a flattened portion QC which is riveted to the spring;` steel extension 19D Which is pivotally connected at 19E to vthe bottom side ot the gate 1G and centrally between'its sides. The bary 19B is provided near its lower end with a. collar 191" which is fixed to tlielbar With a. pin 19?. The collar 191'1 is provided with a groove or channel 19H for the book i9 to prevent any relative rotation between the booll) and the bar 19B. A. coil spring. 19S extends about the bar 9.3 between the collar 191 andi theiupper bearinggY lil-A. A, Aflexible chain 20 ory cable secured to thepitewall atene. end and at its other. lendI to the nook i9. tor` positively re. taining the hook inoperative. position. for

engagementby the bucket when the gate 16.

19S is compressed to absorb the initial. shock' When the bucket is filled. and begins its up-V ward movement the sprung-g` 19S expands to normal positionv and .thegate i6. is gradually closed .against the. pressure. of the material by( thefengagement of the Wearing .strips 18E and tliecoopcrative.action ot the. counter- Weights. 17. lWhen the bucket is elevated from. the pitthe hook 19 andsupport 2O assu-me the position shown in. dotted lines in Figure l.

I. claim:

permit the tlow ot he material from said chute into said bucket.

2. The comlnnation with. a. materialfdischarge. chute ai'idafgate piyotally mounted on .ea-id chute, of a single hook pivotally mounted totiiebottoni ot said gate. and centrally between itspivotal supports, said.'

hook including a pair ot relatively movable members. and. a single resilient element betweensaid members,u anda` movable bucket adapted toengageonevo said hook membersto compressi said resilient element. during u the downward movement vof said' liook'to open saidgate against the pressure of said" counteriveiglit to thereby permit .the flow ot the material from said chute into' said bucket.

3. The combination olf a cliute,ja gate pivotally mounted on said` cli'ute andicomprisingy a bottomfplate7` a. pairot side plates,

a pair ol" angle irons securing said'bottom andl side plates together,y and a' counterweiglit attached to each of saidangle irons in the plane ot said' sides for retaining said gate in closedvposition.

Ll. Apparatus as embodied yin claims 8, and' including an elevated bucket and means operable by said bucketor moving'saidgate into open position to permit' the discharge of material trom said chute into said'buckct. ln Witness whereof 'fallin my signature.

oLYDn P. Ross... 

